Jeff Sessions colludes with Russia’s ambo in plain sight.

The story about the connection between Russia and the Donald Trump presidential campaign is either the most elaborate cover-up of all time, or the dumbest. More evidence for the dumb theory arrives with the news that during his confirmation hearings Attorney General Jeff Sessions didn’t tell Senators about two 2016 meetings with Russia’s ambassador to the U.S.

The Washington Post reported late Wednesday that Mr. Sessions had two conversations with Sergei Kislyak last year, one a brief chat amid a gaggle of other...